A 32-year-old man is brought to the emergency department following a high-speed motor vehicle collision. He was the unrestrained driver. On arrival, his blood pressure is 88/56 mmHg, heart rate 128 bpm, respiratory rate 24/min, and Glasgow Coma Scale is 14. Examination reveals a distended abdomen with severe tenderness and bruising over the left flank. Focused Assessment with Sonography for Trauma (FAST) shows free fluid in the peritoneal cavity. Hemoglobin is 9.2 g/dL (baseline unknown). What is the most appropriate immediate management?

Explanation

## Clinical Context This patient presents with **hemorrhagic shock Class III** (systolic BP 70–90 mmHg, HR >120 bpm, altered mental status) secondary to blunt abdominal trauma with evidence of intra-abdominal bleeding (FAST-positive, distended abdomen, flank bruising). ## Permissive Hypotension Strategy **Key Point:** In penetrating or blunt trauma with ongoing hemorrhage and hypotension, the current standard is **permissive hypotension** (target systolic BP 90 mmHg) with **restricted fluid resuscitation** until definitive hemorrhage control is achieved in the operating room. **High-Yield:** The paradigm shift from "aggressive fluid resuscitation" to "permissive hypotension" is based on evidence that excessive early fluids: - Dilute clotting factors and platelets (coagulopathy) - Increase bleeding from disrupted vessels (loss of tamponade effect) - Worsen outcomes in hemorrhagic shock **Mnemonic:** **MARCH** (Massive transfusion protocol priorities): - **M**assive bleeding control (tourniquet, direct pressure) - **A**irway and breathing - **R**esuscitation (permissive, not aggressive) - **C**oagulopathy correction (FFP, platelets, cryoprecipitate) - **H**ypothermia prevention ## Why This Patient Needs OR Urgently 1. **FAST-positive** = intra-abdominal hemorrhage confirmed 2. **Hemodynamic instability** despite initial assessment 3. **Altered mental status** (GCS 14) = inadequate cerebral perfusion 4. **Blunt abdominal trauma** with free fluid = likely solid organ injury (spleen, liver) or mesenteric bleeding **Clinical Pearl:** In hemorrhagic shock from blunt trauma, do NOT delay operative intervention for imaging or aggressive fluid boluses. Permissive hypotension buys time for rapid transfer while minimizing dilutional coagulopathy. ## Resuscitation Approach - **Initial fluid:** 500 mL bolus of crystalloid or blood product (not 2 L) - **Target BP:** Systolic ≥90 mmHg (not normotensive) - **Definitive control:** Operating room for hemorrhage source identification and hemostasis - **Concurrent:** Type and cross-match, prepare for massive transfusion protocol [cite:ATLS 10th Edition, Chapter 3: Shock]